Spatially resolved circumnuclear dust in centaurus a

Margarita Karovska, Massimo Marengo, Martin Elvis, Giovanni G. Fazio, Joseph L. Hora, Philip M. Hinz, William F. Hoffmann, Michael Meyer, Eric Mamajek

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

In this Letter, we present results from our exploratory mid-IR study of Centaurus A circumnuclear environment using high angular resolution imaging at the Magellan 6.5 m telescope with the MIRAC/BLINC camera. We detected emission from a compact region surrounding the nuclear source and obtained photometry at 8.8μm and in the N band. Our analysis suggests that the nuclear region is resolved with a size of ≈ 3 pc. The mid-IR emission from this region is likely associated with cool dust with an estimated temperature of ∼160 K, surrounding the central "hidden" active galactic nucleus (AGN). We discuss the characteristics of this emission in relation to other mid-IR observations and the implications on models of dust formation in AGNs.

Original languageEnglish (US)
Pages (from-to)L91-L94
JournalAstrophysical Journal
Volume598
Issue number2 II
DOIs
StatePublished - Dec 1 2003

Keywords

  • Galaxies: active
  • Galaxies: individual (Centaurus A, NGC 5128)
  • Galaxies: nuclei
  • Techniques: high angular resolution

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Karovska, M., Marengo, M., Elvis, M., Fazio, G. G., Hora, J. L., Hinz, P. M., Hoffmann, W. F., Meyer, M., & Mamajek, E. (2003). Spatially resolved circumnuclear dust in centaurus a. Astrophysical Journal, 598(2 II), L91-L94. https://doi.org/10.1086/380816